<template>
    <div class="cart">
      <Header></Header>
      <div class="cart_info">
        <div class="cart_title">
          <span class="text">我的购物车</span>
          <span class="total">共{{course_list.length}}门课程</span>
        </div>
        <div class="cart_table">
          <div class="cart_head_row">
            <span class="doing_row"></span>
            <span class="course_row">课程</span>
            <span class="expire_row">有效期</span>
            <span class="price_row">单价</span>
            <span class="do_more">操作</span>
          </div>
          <div class="cart_course_list">
            <CartItem
              :key="key"
              :course_key="key"
              :token="token"
              :course="course"
              v-for="course,key in course_list"
              @del_cart="del_cart"
              @calc_total="calc_total"
            ></CartItem>
          </div>
          <div class="cart_footer_row">
            <span class="cart_select"><label> <el-checkbox v-model="checked"></el-checkbox><span>全选</span></label></span>
            <span class="cart_delete"><i class="el-icon-delete"></i> <span>删除</span></span>
            <span class="goto_pay"><router-link to="/buy">去结算</router-link></span>
            <span class="cart_total">总计：¥{{total.toFixed(2)}}</span>
          </div>
        </div>
      </div>
      <Footer></Footer>
    </div>
</template>

<script>
import Header from "./common/Header"
import Footer from "./common/Footer"
import CartItem from "./common/CartItem"
export default {
    name: "Cart",
    data(){
      return {
        token: "",
        course_list: [], // 购物车中的商品信息
        checked: false,
        total: 0,
      }
    },
    created(){
        this.token = this.$settings.token();
        this.check_user_login();
        this.get_cart();
    },
    methods:{
      check_user_login(){
         if(!this.token){
            this.$confirm('对不起，您尚未登录请登录后继续操作, 是否继续?', '路飞学城', {
              confirmButtonText: '登录',
              cancelButtonText: '返回上一页',
              type: 'error'
            }).then(() => {
                this.$router.push("/user/login");
            }).catch(() => {
                this.$router.go(-1);
            });
            return false; // 阻止代码继续往下执行
        }
      },
      get_cart(){
          // 获取购物车数据
          this.$axios.get(`${this.$settings.Host}/cart/`,{
              headers:{
                  Authorization: "jwt " + this.token,
              }
          }).then(response=>{
              this.course_list = response.data;
              // 计算总价格
              this.calc_total();
          }).catch(error=>{
              this.$message.error("对不起，获取购物车商品失败！");
          })
      },
      del_cart(key){
          // 进行删除商品的页面操作
          this.course_list.splice(key,1);
          // 删除完成了以后，直接重新计算价格
          this.calc_total();
      },
      calc_total(){
        let total = 0;
        for(let course of this.course_list){
            if(course.selected){
                total+=parseFloat(course.price)
            }
        }
        this.total = total;
      }
    },
    components:{
      Header,
      Footer,
      CartItem,
    }
}
</script>

<style scoped>
.cart_info{
  width: 1200px;
  margin: 0 auto 200px;
}
.cart_title{
  margin: 25px 0;
}
.cart_title .text{
  font-size: 18px;
  color: #666;
}
.cart_title .total{
  font-size: 12px;
  color: #d0d0d0;
}
.cart_table{
  width: 1170px;
}
.cart_table .cart_head_row{
  background: #F7F7F7;
  width: 100%;
  height: 80px;
  line-height: 80px;
  padding-right: 30px;
}
.cart_table .cart_head_row::after{
  content: "";
  display: block;
  clear: both;
}
.cart_table .cart_head_row .doing_row,
.cart_table .cart_head_row .course_row,
.cart_table .cart_head_row .expire_row,
.cart_table .cart_head_row .price_row,
.cart_table .cart_head_row .do_more{
  padding-left: 10px;
  height: 80px;
  float: left;
}
.cart_table .cart_head_row .doing_row{
  width: 78px;
}
.cart_table .cart_head_row .course_row{
  width: 530px;
}
.cart_table .cart_head_row .expire_row{
  width: 188px;
}
.cart_table .cart_head_row .price_row{
  width: 162px;
}
.cart_table .cart_head_row .do_more{
  width: 162px;
}

.cart_footer_row{
  padding-left: 30px;
  background: #F7F7F7;
  width: 100%;
  height: 80px;
  line-height: 80px;
}
.cart_footer_row .cart_select span{
  font-size: 18px;
  margin-left: 15px;
  color: #666;
}
.cart_footer_row .cart_delete{
  margin-left: 58px;
}
.cart_delete .el-icon-delete{
  font-size: 18px;
}

.cart_delete span{
  margin-left: 15px;
  cursor: pointer;
  font-size: 18px;
  color: #666;
}
.cart_total{
  float: right;
  margin-right: 62px;
  font-size: 18px;
  color: #666;
}
.goto_pay{
  float: right;
  width: 159px;
  height: 80px;
  outline: none;
  border: none;
  background: #ffc210;
  font-size: 18px;
  color: #fff;
  text-align: center;
  cursor: pointer;
}
</style>
